Вісник № 38
Постійне посилання зібрання
Переглянути
Нові надходження
Документ Вимушені коливання циклосиметричного лопаткового апарату з випадковим технологічним розладом(НТУ "ХПІ", 2007) Жовдак, В. О.; Ларін, Олексій Олександрович; Головко, О. М.Investigation of the harmonic vibration of the lump-mass discrete cyclic model of bladed disk of the first stage of the stem turbine with the random mistuning is carried out by means of Monte-Carlo method. Various realizations of the mistuning and corresponding to them amplitude-frequency characteristics are investigated. The expectations and variances for the frequency-response curve are built.Документ Активное гашение нестационарных колебаний прямоугольной пластины(НТУ "ХПИ", 2007) Янютин, Е. Г.; Воропай, Алексей ВалериевичThe procedure of active damping of the nonstationary vibration for rectangular plate is presented. The damping is executed by the system of four nonstationary concentrated forces obtained as a result of solving an inverse problem of Timoshenko's plate dynamic theory. The problem is reduced to the system of the first-kind Volterra integral equations solved numerically with means of Tikhonov's regularization method.Документ К вопросу о тестовых задачах для кругового цилиндра(НТУ "ХПИ", 2007) Ткачук, Николай НиколаевичJn the paper the construction of a series of master solutions for circular cylinder is discussed. These solutions were applied to verify a finite element model with two cases of boundary loading.Документ Определение точности метода фотоупругости(НТУ "ХПИ", 2007) Тесленко, А. А.New method of accuracy definition for the method of photoelasticity is considered in the paper. Essence of a method consists in the modelling way of accuracy determination. Accuracy is determined in comparison of initial (modelling) stresses and stresses determined in the simulated way of measurement. The stresses determined in real experiment are used as initial (modelling) stresses. The correctness of this method is investigated.Документ Про одну умовно потенціальну силову схему(НТУ "ХПІ", 2007) Таран, С. Н.The specific force scheme determined in bounded area is considered in this work. The introductions of a potential for the movements in the strictly certain direction is supposed in this scheme.Документ Напряженно-деформированное состояние зубчатых передач с позиций термоконтактного деформирования в упруго-пластической области и в условиях ползучести(НТу "ХПИ", 2007) Приймаков, А. Г.; Устиненко, Александр Витальевич; Приймаков, Григорий АлександровичContact task in a resiliently-plastic area at presence of chafing in the contact area is considered. The method of determination of thermal-contact strains and stress of some stratum, being under the surface stratum of tooth in the conditions of creep is offered.Документ Оптимальное проектирование механизма наклона плавильной печи: модели для анализа напряженно-деформированного состояния(НТУ "ХПИ", 2007) Полищук, Тарас ВикторовичIn this paper models for research of stressedly-deformed state of model of smelting furnace are described. The generation of geometry and finite-element net is conducted with integrated parameterization of dimensions, efforts and parameters of finite-element net.Документ Изменение теплопроводности контакта элементов лазерного гироскопа под действием прижимного усилия(НТУ "ХПИ", 2007) Погорелов, Сергей Юрьевич; Счастливец, Кирилл Юрьевич; Марусенко, Светлана ИвановнаThe measurement accuracy of ring laser gyros depends on temperature field parameters. In the proposed paper the influence of contact thermal conduction between the construction cover and laser gyroscope resonator including deformations depending on mechanical construction spring pretension was analyzed.Документ Расчет посадок с натягом при овальности и эксцентриситете соединяемых деталей на основе ПК ANSYS(НТУ "ХПИ", 2007) Перин, А. П.; Андреев, Арнольд ГеоргиевичIn this paper the mode of deformations of interference fit of bush and shaft in various ways of fitting was analyzed, namely round shaft and round aperture of the bush, oval shaft and round aperture of the bush, round shaft and bush with eccentricity, oval shaft and bush with eccentricity and the angel 0, 45 or 90 degrees between out-of-roundness and eccentricity. Hertzian problem is solved by the program complex ANSYS. Results are given in the form of tables and drawings.Документ Переходные и стационарные режимы в системе с ограниченным возбуждением(НТУ "ХПИ", 2007) Перепелкин, Николай Викторович; Михлин, Юрий ВладимировичTransient in a non-ideal system with limited excitation, where an interaction of engine and linear elastic subsystem takes place, is considered. The transient in described by the multiple scales method. Possibility of transfer to stationary regimes, including a resonance regime, is considered. Numerical simulation confirms an efficiency of the obtained analytical solutions.Документ Общие подходы к проектированию специализированного программного комплекса решения задач оптимизации(НТУ "ХПИ", 2007) Овчаренко, В. В.The work is devoted to basic approaches for projecting and design of a specialized optimization program product. The basic requirements for developing system were stated. The design principles were developed. Structural elements was distinguished. The common scheme of interaction between structural elements in frames of computing cluster was elaborated. The sphere of problems for further product development was described.Документ Прискорення газовим потоком руху краплі, шо випаровується за законом Срезневського(НТУ "ХПІ", 2007) Ольшанський, В. П.; Лавінський, Володимир Іванович; Ольшанський, Станіслав ВасильовичThe motion of an evaporating drop, as material point of decreasing mass, is described by nonlinear differential equation with variable coefficients. After special transformation at equalvariable motion of gas the analytical solution of Cauchy problem is found in Airy functions.Документ Переходные процессы в системах с двумя степенями свободы, содержащих существенно нелинейный гаситель(НТУ "ХПИ", 2007) Михлин, Юрий Владимирович; Руднева, Гаянэ Валериковна; Бунакова, Т. В.Transient in a system containing a linear oscillator, linearly coupled to an essentially nonlinear attachment with a comparatively small mass, is considered. A damping is taken into account. The multiple scales method is used to construct a rocess of transient in the system under consideration. A transfer of energy from the initially perturbed linear subsystem to the nonlinear absorber can be observed. A similar construction is made to describe the transient in a system which contains a linear oscillator and a vibro-impact attachment with a comparatively small mass. A transient in such system under the external periodical excitation was considered too. Numerical simulation confirms an efficiency of the analytical construction in both systems.Документ Определение жесткостных характеристик радиальных магнитных подшипников на двух кольцевых постоянных магнитах(НТУ "ХПИ", 2007) Мартыненко, Геннадий ЮрьевичIn the paper the procedure of calculation of power descriptions and definition of quasielastic coefficients for the radial magnetic bearings on two permanent circular magnets is offered. This procedure is based on the finite element analysis. Comparison of design and experimental data is xecuted. Comparative description of two types of the magnetic bearings is carried out.Документ Анализ чувствительности характеристик прочности и жесткости структурно связанных систем(НТУ "ХПИ", 2007) Лавинский, Владимир Иванович; Назаренко, Сергей Александрович; Анацкий, Юрий ПетровичThe methods to analyze the sensitivity of complicated finite-element models of structurally connected systems are proposed in this paper. Computational stages are investigated. The applications of developed mathematical apparatus are examined.Документ Особенности твердотельного геометрического моделирования машиностроительных объектов(НТУ "ХПИ", 2007) Красников, Сергей Васильевич; Руденко, Сергей СергеевичThe problems, related with programming of CAD systems for geometrical modeling of mechanical construction, are considered. The cast of common standards related with modern CAD systems a described. Variant of necessary parameters in future design of CAD systems for mechanic a done.Документ Исследование вынужденных колебаний осцилятора в около резонансной области для различных характеристик демпфирования(НТУ "ХПИ", 2007) Хромов, Е. В.Forced bending vibrations of steel bar under the action of the internal forces are studied. Quantitative analysis of influence of different damping function variants on amplitude-frequency characteristics is shown.Документ Моделироавние и численный анализ сварных узлов циркуляционного насоса с технологическими дефектами(НТУ "ХПИ", 2007) Кедровская, Ольга Валентиновна; Мартыненко, Геннадий Юрьевич; Пирогов, А. Д.In article the scheme of the goods accounting at the retail trade firm is considered, necessity of the computerized of the goods accounting as the basic parameter of work of trade enterprises is retail commodity circulation shows.Документ К вопросу о диагностировании состояния металлоконструкции углеперегружателя(НТУ "ХПИ", 2007) Гусев, Ю. Б.The method of diagnosing of the state of metalware of coal-loader is described in the paper. The research data are presented on the example of crane-loader made by FEB, FTA, Germany.Документ Моделирование и численный анализ напряженно-деформированного состояния фрагмента поясничного отдела позвоночника(НТУ "ХПИ", 2007) Гречихина, Н. В.; Сукиасов, Владимир ГеоргиевичThe comparative analysis results of stress state of spine in the normal state and with fixing are presented. Calculations are executed by finite element method in three-dimensional statement. Criterion of the comparison is the stress state level of vertebra and fix by physiological loading.